I'm Bill Moyers. It's good to have your ear. This week on Moorers & Company, astrophysicist

Neil de Grasse Tyson on science, God, and the universe.

If God is the mystery of the universe, these mysteries, we're tackling these mysteries, one by one.

If you're going to stay religious at the end of the conversation, God has to be more to you than just where science has yet to tread.

Welcome to the next part of my conversation with Neil deGrasse Tyson. He's the director of the Hayden Planetarium at New York's American Museum of Natural History.

He's also the narrator of a mesmerizing new show at the planetarium called Dark Universe,

and this spring he'll appear as the host of a remake of the classic PBS series Cosmos.

You can see it on the National Geographic Channel and Fox TV.

In our first episode, Neil deGrasse Tyson talked about the phenomenon of dark energy,

the accelerating expansion of our universe.

We expected gravity to be slowing down the expanding universe.

The opposite is happening.

We don't know what's causing.

Nor do Tyson and his colleagues yet fully comprehend another cosmic enigma known as dark matter.

There is no known objects accounting for most of the effect of gravity in the universe.

Something is making stuff move that is not anything we have ever touched.

On that mysterious note, we begin the next part of my talk with Neil deGrasse Tyson.

Welcome.

Thank you.

There were two strange sequences in your planetarium show, and I managed to go online and look at...

You become a dark matter junkie here. I didn't know.

You're going on...

...